func call16(typ, fn, stackArgs unsafe.Pointer, stackArgsSize, stackRetOffset, frameSize uint32, regArgs *abi.RegArgs)
func call32(typ, fn, stackArgs unsafe.Pointer, stackArgsSize, stackRetOffset, frameSize uint32, regArgs *abi.RegArgs)
func call64(typ, fn, stackArgs unsafe.Pointer, stackArgsSize, stackRetOffset, frameSize uint32, regArgs *abi.RegArgs)

	g, after := startDebugCallWorker(t)
	defer after()

	type stackArgs struct {
		x0    int
		x1    float64
		y0Ret int
		y1Ret float64
	}

	// Inject a call into the debugCallWorker goroutine and test
	// basic argument and result passing.
	fn := func(x int, y float64) (y0Ret int, y1Ret float64) {
		return x + 1, y + 1.0
	}
	var args *stackArgs
	var regs abi.RegArgs
	intRegs := regs.Ints[:]

// running.
//
// On success, InjectDebugCall returns the panic value of fn or nil.
// If fn did not panic, its results will be available in args.
func InjectDebugCall(gp *g, fn any, regArgs *abi.RegArgs, stackArgs any, tkill func(tid int) error, returnOnUnsafePoint bool) (any, error) {
	if gp.lockedm == 0 {
		return nil, plainError("goroutine not locked to thread")
	}

	tid := int(gp.lockedm.ptr().procid)
	if tid == 0 {

	// R7: scratch
	// R8: copy of RSP - (R2)(RSP) assembles as (R2)(ZR)
	SUB	$8, R0, R4
	LSL	$3, R4
	ADD	$(8*8), R12, R5
	MOVD	$0, R6
	MOVD	RSP, R8
stackargs:
	MOVD	(R6)(R5), R7
	MOVD	R7, (R6)(R8)
	ADD	$8, R6
	CMP	R6, R4
	BNE	stackargs

_8args:
	MOVD	(7*8)(R12), R7
_7args:
	MOVD	(6*8)(R12), R6
_6args:
	MOVD	(5*8)(R12), R5
_5args:
	MOVD	(4*8)(R12), R4
_4args:
	MOVD	(3*8)(R12), R3

	// R3: scratch
	// R4: pointer to libcall struct
	// R12: libcall->args
	MOVW	$0, R2
stackargs:
	ADD	$4, R2, R3		// r3 = args[4 + i]
	MOVW	R3<<2(R12), R3
	MOVW	R3, R2<<2(R13)		// stack[i] = r3

	ADD	$1, R2			// i++
	SUB	$4, R0, R3		// while (i < (n - 4))
	CMP	R3, R2
	BLT	stackargs

loadregs:
	CMP	$3, R0
	MOVW.GT 12(R12), R3

	CMP	$2, R0
	MOVW.GT 8(R12), R2

	CMP	$1, R0

	Not; \
	If; \
		Get SP; \
		I64Load stackArgs+16(FP); \
		I32WrapI64; \
		I64Load stackArgsSize+24(FP); \
		I32WrapI64; \
		MemoryCopy; \
	End; \
	\
	MOVD f+8(FP), CTXT; \
	Get CTXT; \
	I32WrapI64; \
	I64Load $0; \
	CALL; \
	\
	I64Load32U stackRetOffset+28(FP); \
	Set R0; \
	\
	MOVD stackArgsType+0(FP), RET0; \
	\
	I64Load stackArgs+16(FP); \
	Get R0; \
	I64Add; \

	JALR	ZERO, T2
// Note: can't just "BR NAME(SB)" - bad inlining results.

// func call(stackArgsType *rtype, fn, stackArgs unsafe.Pointer, stackArgsSize, stackRetOffset, frameSize uint32, regArgs *abi.RegArgs).
TEXT reflect·call(SB), NOSPLIT, $0-0
	JMP	·reflectcall(SB)

// func call(stackArgsType *_type, fn, stackArgs unsafe.Pointer, stackArgsSize, stackRetOffset, frameSize uint32, regArgs *abi.RegArgs).

	}

	// Call.
	call(frametype, fn, stackArgs, uint32(frametype.Size()), uint32(abid.retOffset), uint32(frameSize), &regArgs)

	// For testing; see TestCallMethodJump.
	if callGC {
		runtime.GC()
	}

	var ret []Value
	if nout == 0 {
		if stackArgs != nil {
			typedmemclr(frametype, stackArgs)
			framePool.Put(stackArgs)
		}
	} else {
		if stackArgs != nil {

	MOVV	R29, R29

	MOVV	R0, REGCTXT
	JMP	runtime·morestack(SB)

// reflectcall: call a function with the given argument list
// func call(stackArgsType *_type, f *FuncVal, stackArgs *byte, stackArgsSize, stackRetOffset, frameSize uint32, regArgs *abi.RegArgs).
// we don't have variable-sized frames, so we use a small number
// of constant-sized-frame functions to encode a few bits of size in the pc.

	MOVD	R15, R15

	MOVD	$0, R12
	BR	runtime·morestack(SB)

// reflectcall: call a function with the given argument list
// func call(stackArgsType *_type, f *FuncVal, stackArgs *byte, stackArgsSize, stackRetOffset, frameSize uint32, regArgs *abi.RegArgs).
// we don't have variable-sized frames, so we use a small number
// of constant-sized-frame functions to encode a few bits of size in the pc.